Patna: A day after Yasin Bhatkal was arrested from Indo-Nepal border, the Indian Mujahideen co-founder is being brought to Delhi by a team of National Investigating Agency (NIA) officials on Friday.

Yasin Bhatkal was restless and spent a sleepless night at a high security zone here, officials said. He was arrested along with Asadullah Akhtar, his terror accomplice.

After they spent a sleepless night, the NIA sleuths early Friday interrogated Yasin Bhatkal and Asadullah Akhtar.

Yasin Bhatkal, wanted by police in twelve states for alleged involvement in a string of bombings and other terror activities in the last five years, was arrested from the India-Nepal border Thursday.

"Both of them hardly slept at night, talked rarely but they ate food and drank adequate water...," said a police official.

According to another police official, Bhatkal was more restless than Akhtar at night.

"A team of NIA officials interrogated Bhatkal and Akhtar at the high security Bihar Military Police camp in Patna since early Friday after they spent night here," a police official said.

Bhatkal, whose real name is Ahmed Siddibappa, was one of the most wanted men in India as he is believed to be the backbone of the IM network. Operating under various aliases - Mohammad Zarrar, Ahmed, Imran, Asif and Shahrukh – Bhatkal was the only IM founder member who was operating in the country.

A native of Bhatkal town near Mangalore in Karnataka, he along with his cousins Riyaz and Iqbal Bhatkal had formed the IM. Both Riyaz and Iqbal are said to be hold up in Pakistan.

Riyaz Bhatkal is believed to have played an active part in almost all terror attacks by the IM including the Hyderabad, Banglore and Pune blasts. Infact, he was caught on the CCTV camera of the German Bakery in Pune when he personally went there to plant the bomb.